Let your smart phone help you! You can now get answers to pressure maintenance queries in heating, solar power and hot water systems at the touch of a button – even in the darkest boiler room! The Reflex Pro App allows you to calculate in situ expansion vessels, define upstream and filling pressures, and take appropriate steps with respect to the hardness of water used to fill and top up systems in accordance with VDI 2035. Ideal for project surveys, initial consultations, and producing highly accurate calculations on site.